This unique audio system is capable of transferring analog and digital audio data directly to Windows and Mac computers. The latest Plug and Play technology guarantees a simple installation, even for the inexperienced user. Numerous unique features like a well thought-out Settings dialog and an integrated routing solution realize a quick, comfortable and efficient operation of the Fireface UCX II.

The Fireface UCX II houses two mic/line preamps in XLR combo configuration on the front panel, along with two digitally controlled line/instrument inputs, followed by a headphone jack, various control buttons, a display, and the main volume knob. At the rear is a set of ten analogue balanced line inputs and outputs, MIDI I/O, ADAT I/O, AES/EBU and SPDIF I/O, USB 2.0 as well as a switchable word clock I/O.

With the SteadyClock FS, the Fireface UCX II features the latest clock and jitter rejection technology from RME. Based on a femtosecond clock, SteadyClock FS reduces the intrinsic jitter when converting from and to analogue over all digital formats to a new all-time low.

---

Features

• All settings can be changed in real-time
• Buffer sizes/latencies from 48 up to 8192 samples selectable
• 4 channels 96 kHz/24 bit Record/Playback via ADAT optical (S/MUX)
• 2 channels 192 kHz/24 bit Record/Playback via ADAT optical (S/MUX4)
• Clock modes slave and master
• Automatic and intelligent master/slave clock control
• Unsurpassed Bitclock PLL (audio synchronization) in ADAT mode
• SteadyClock FS: Jitter-immune, super-stable digital clock
• DDS technology for free setting of the sample rate
• SyncAlign guarantees sample aligned and never swapping channels
• SyncCheck tests and reports the synchronization status of input signals
• TotalMix for latency-free submixes and perfect ASIO Direct Monitoring
• TotalMix: 800 channel mixer with 46 bit internal resolution
• TotalMix FX: 3-band EQ, Low Cut, Reverb, Echo, Compressor, Expander, Auto Level
• 1 x MIDI I/O, 16 channels high-speed Low-Jitter MIDI
• 1 x Hi-power low impedance headphone output
• DIGICheck DSP: Level meter in hardware, peak- and RMS calculation

---

Specifications

AD, Line In 5-8, rear

• Resolution AD: 24 bit
• Signal to Noise ratio (SNR): 112 dB RMS unweighted, 115 dBA
• Frequency response @ 44.1 kHz, -0.1 dB: 5 Hz – 20.8 kHz
• Frequency response @ 96 kHz, -0.5 dB: 3 Hz – 45.8 kHz
• Frequency response @ 192 kHz, -1 dB: 2 Hz – 92 kHz
• THD: < -110 dB, < 0.00032 %
• THD+N: < -104 dB, < 0.00063 %
• Channel separation: > 110 dB
• Input: 6.3 mm TRS jack, electronically balanced
• Input impedance: 8 kOhm unbalanced, 12 kOhm balanced
• Input sensitivity switchable to +19 dBu and +13 dBu
• Variable gain: 0 to +12 dB
• Minimum level for 0 dBFS: +1 dBu, -1.2 dBV

Line In 3-4, front

As AD, but:

• Additional Gain stage: 0 up to +12 dB
• Maximum input level, +19 dBu, Gain 0 dB: Line +19 dBu, Inst +13 dBu
• Maximum input level, +13 dBu, Gain 12 dB: Line +1 dBu, Inst -5 dBu
• Input impedance: Instrument 1 MOhm. Line 13 kOhm balanced, 9 kOhm unbalanced
• Input Gain Inst: +6 dB
• Input mode: Line balanced (TRS), Inst unbalanced (TS)

Microphone In 1-2, front

As AD, but:

• Input: XLR, electronically balanced
• Input impedance: 5.4 kOhm
• Gain range: 75 dB
• Maximum input level, Gain 0 dB: +18 dBu
• Maximum input level, Gain 75 dB: -57 dBu
• EIN: -128 dBu A-weighted, 60 dB gain,150 Ohm, 20 Hz – 20 kHz

Line In 1-2

As AD, but:

• Input: TRS, electronically balanced
• Input impedance: 10 kOhm balanced, 5 kOhm unbalanced
• Maximum input level, Gain 0 dB: +24 dBu
• Maximum input level, Gain 75 dB: -51 dBu

DA, Line Out 1-6, rear

• Resolution: 24 bit
• Dynamic range (DR): 112 dB RMS unweighted, 115 dBA
• Frequency response @ 44.1 kHz, -0.5 dB: 5 Hz – 20.8 kHz
• Frequency response @ 96 kHz, -0.5 dB: 5 Hz – 45 kHz
• Frequency response @ 192 kHz, -1 dB: 5 Hz - 89 kHz
• THD: < -108 dB, < 0.0004 %
• THD+N: < -104 dB, < 0.00063 %
• Channel separation: > 110 dB
• Maximum output level: +19 dBu
• Output: 6.3 mm TRS jack, servo-balanced
• Output impedance: 75 Ohm
• Output level switchable +19 dBu, +13 dBu, +4 dBu

DA - Stereo Monitor Output Phones (7-8)

As DA, but:

• Output: 6.3 mm TRS stereo jack, unbalanced
• Maximum output level at 0 dBFS, High: +19 dBu
• Maximum output level at 0 dBFS, Low: +4 dBu
• Output impedance: 1 Ohm
• Max power per channel @ 32 Ohm load, 0.1% THD: 210 mW (2.6 Vrms, +10.5 dBu)

MIDI

• 1 x MIDI I/O via 5-pin DIN jacks
• Galvanically isolated by optocoupled input
• Hi-speed mode: Jitter and response time typically below 1 ms
• Separate 128 byte FIFOs for input and output

Digital

• Clocks: Internal, ADAT, AES, SPDIF, word clock
• Jitter suppression of external clocks: > 50 dB (2.4 kHz)
• Effective clock jitter influence on AD and DA conversion: near zero
• PLL ensures zero dropout, even at more than 100 ns jitter
• Digital Bitclock PLL for trouble-free varispeed ADAT operation
• Supported sample rates: 28 kHz up to 200 kHz

Digital Inputs

AES/EBU

• 1 x XLR, transformer-balanced, galvanically isolated, according to AES3-1992
• High-sensitivity input stage (< 0.3 Vpp)
• SPDIF compatible (IEC 60958)
• Accepts Consumer and Professional format
• Lock range: 27 kHz – 200 kHz
• Jitter suppression: > 50 dB (2.4 kHz)

SPDIF coaxial

• 1 x RCA, according to IEC 60958
• High-sensitivity input stage (< 0.3 Vpp)
• Accepts Consumer and Professional format, copy protection will be ignored
• Lock Range: 27 kHz – 200 kHz
• Jitter suppression: > 50 dB (2.4 kHz)

ADAT Optical

• 1 x TOSLINK, format according to Alesis specification
• Standard: 8 channels 24 bit, up to 48 kHz
• Double Speed (S/MUX): 4 channels 24 bit 96 kHz
• Quad Speed (S/MUX4): 2 channels 24 bit 192 kHz
• Bitclock PLL ensures perfect synchronisation even in varispeed operation
• Lock range: 31.5 kHz – 50 kHz
• Jitter suppression: > 50 dB (2.4 kHz)
• SPDIF compatible (automatic detection)

Word Clock

• BNC
• Internal termination 75 Ohm switchable
• Automatic Double/Quad Speed detection and internal conversion to Single Speed
• SteadyClock guarantees super low jitter synchronization even in varispeed operation
• Not affected by DC-offsets within the network
• Signal Adaptation Circuit: signal refresh through auto-center and hysteresis
• Overvoltage protection
• Level range: 1.0 Vpp – 5.6 Vpp
• Lock Range: 27 kHz – 200 kHz
• Jitter suppression: > 50 dB (2.4 kHz)

Digital Outputs

AES/EBU

• XLR, transformer-balanced, galvanically isolated, according to AES3-1992
• Output level Professional 4.5 Vpp, Consumer 2.6 Vpp
• Format Professional according to AES3-1992 Amendment 4
• Format Consumer (SPDIF) according to IEC 60958
• Single Wire mode, sample rate 28 kHz up to 200 kHz

SPDIF coaxial

• 1 x RCA, according to IEC 60958
• Output level Professional 1.2 Vpp, Consumer 0.6 Vpp
• Format Professional according to AES3-1992 Amendment 4
• Format Consumer (SPDIF) according to IEC 60958
• Single Wire mode, sample rate 28 kHz up to 200 kHz

ADAT

• 1 x TOSLINK, format according to Alesis specification
• Standard: 8 channels 24 bit, up to 48 kHz
• Double Speed (S/MUX): 4 channels 24 bit 96 kHz
• Quad Speed (S/MUX4): 2 channels 24 bit 192 kHz

Word Clock

• BNC
• Max. output voltage: 5 Vpp
• Output voltage @ 75 Ohm termination: 4.0 Vpp
• Output impedance: 10 Ohm
• Frequency range: 27 kHz – 200 kHz

General

• Power supply: external power supply
• Typical power consumption: 13 Watts
• Current at 12 Volt operating voltage: 910 mA (11 Watts)
• Dimensions incl. rack ears, full depth (WxHxD): 258 x 44 x 155 mm (10.16" x 1.73" x 6.1")
• Dimensions without rack ears, body depth (WxHxD): 215 x 44 x 130 mm (8.5" x 1.73" x 5.1")
• Weight: 910 g ( 2.0 lbs)
• Temperature range: +5° up to +50° Celsius (41° F up to 122°F)
• Relative humidity: < 75%, non condensing